JP4458809B2 - Method for controlling a light beam emitted from a lighting device of an automobile and a system for implementing this method - Google Patents

Method for controlling a light beam emitted from a lighting device of an automobile and a system for implementing this method Download PDF

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JP4458809B2
JP4458809B2 JP2003367421A JP2003367421A JP4458809B2 JP 4458809 B2 JP4458809 B2 JP 4458809B2 JP 2003367421 A JP2003367421 A JP 2003367421A JP 2003367421 A JP2003367421 A JP 2003367421A JP 4458809 B2 JP4458809 B2 JP 4458809B2
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sensor
automobile
illumination
road
control
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JP2004149116A (en
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デュブロヴァン アレクシ
ダリ アレン
バ スィディ
ラコンブ パトリク
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ヴァレオ ビジョンValeo Vision
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00Arrangements or adaptations of optical signalling or lighting devices
    • B60Q1/02Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • B60Q1/1415Dimming circuits
    • B60Q1/1423Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
    • B60Q1/143Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic combined with another condition, e.g. using vehicle recognition from camera images or activation of wipers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00Arrangements or adaptations of optical signalling or lighting devices
    • B60Q1/02Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/06Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely controlled from inside vehicle
    • B60Q1/08Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely controlled from inside vehicle automatically
    • B60Q1/085Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely controlled from inside vehicle automatically due to special conditions, e.g. adverse weather, type of road, badly illuminated road signs or potential dangers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00Arrangements or adaptations of optical signalling or lighting devices
    • B60Q1/02Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/06Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely controlled from inside vehicle
    • B60Q1/08Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely controlled from inside vehicle automatically
    • B60Q1/12Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely controlled from inside vehicle automatically due to steering position
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/62Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution for adaptation between right-hand and left-hand traffic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10Indexing codes relating to particular vehicle conditions
    • B60Q2300/11Linear movements of the vehicle
    • B60Q2300/112Vehicle speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10Indexing codes relating to particular vehicle conditions
    • B60Q2300/11Linear movements of the vehicle
    • B60Q2300/114Vehicle acceleration or deceleration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10Indexing codes relating to particular vehicle conditions
    • B60Q2300/12Steering parameters
    • B60Q2300/122Steering angle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10Indexing codes relating to particular vehicle conditions
    • B60Q2300/13Attitude of the vehicle body
    • B60Q2300/134Yaw
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10Indexing codes relating to particular vehicle conditions
    • B60Q2300/14Other vehicle conditions
    • B60Q2300/142Turn signal actuation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30Indexing codes relating to the vehicle environment
    • B60Q2300/32Road surface or travel path
    • B60Q2300/322Road curvature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30Indexing codes relating to the vehicle environment
    • B60Q2300/33Driving situation
    • B60Q2300/331Driving situation characterised by the driving side, e.g. on the left or right hand side
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30Indexing codes relating to the vehicle environment
    • B60Q2300/33Driving situation
    • B60Q2300/332Driving situation on city roads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30Indexing codes relating to the vehicle environment
    • B60Q2300/33Driving situation
    • B60Q2300/334Driving situation on motorways
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30Indexing codes relating to the vehicle environment
    • B60Q2300/33Driving situation
    • B60Q2300/336Crossings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30Indexing codes relating to the vehicle environment
    • B60Q2300/33Driving situation
    • B60Q2300/337Tunnels or bridges

Description

  The present invention relates to a method for controlling a light beam emitted from an automobile lighting device (headlight) on a road in accordance with the shape of the road. The invention also relates to a system for carrying out this method.

  The present invention can be applied to automobiles such as passenger cars and trucks traveling on roads. The invention is particularly applicable to the field of lighting by such automobiles.

  The number of cars traveling on the road is very large. Therefore, an automobile lighting system must be able to adapt firstly to the road on which the automobile travels and secondly to the driving conditions of the automobile. In particular, in the case of nighttime or bad weather (fog, rain, etc.), it is important that the driver can visually recognize the road extending forward and its boundary as much as possible. In other words, with regard to safety issues, it is desirable to improve the illumination for the front view of the car and to improve the front view of the car driver.

  There are two types of car lighting. The so-called “high beam” that illuminates the entire road over a long distance and the “low beam” that illuminates the road for a short distance to avoid dazzling the driver of the car traveling on the opposite lane. In the case of a high beam, each headlight emits a light beam toward the horizon. In the case of a low beam, each headlight illuminates the road surface with sheet-like light downward and secures a field of view over a distance of 60 to 80 m.

  In order to improve such illumination, it is desirable to change the direction of light emitted from the headlight according to the shape of the road. In other words, when the headlight "follows" the road, i.e. when the road is straight, it illuminates the front of the car straight, and when the road is turning to the right or left, respectively It is desirable to illuminate the left side.

  Lighting devices that follow the road shape are already known, and lighting having this new function is called “curve-compatible lighting”. Such devices generally use data available from automobiles to recognize the shape of the road.

  Some of these devices incorporate a steering angle sensor for a steering wheel that provides information on a traveling locus of an automobile. In this case, the road is illuminated in accordance with the driver's steering operation. For example, if the driver turns the steering wheel to the right, the headlight illuminates the right side of the road, assuming the road is turning right. On the other hand, when the driver does not move the steering wheel, the headlights illuminate the front of the car, such as when moving along a straight line or in front of a curve.

  Such a device has no information about the shape of the road ahead, so there is a time delay in illuminating the direction of the road's turn. Therefore, the driver notices that the light beam is delayed in illuminating the desired position at the beginning of the road, and that when the turn is finished, the light beam returns too late in the direction of the car axle. become. As described above, when switching of the direction in which the headlight illuminates is slow, it is not only uncomfortable for the driver, but also safety is lowered. This is because, every time the curvature of the road changes, a time occurs in which the direction of illumination with respect to the road remains inaccurate.

  Furthermore, in such a device, the direction in which the headlight illuminates depends only on the driver's steering operation. Also, if the driver misoperates the steering wheel, for example, if the steering wheel is turned back while taking out something from the glove box, the shape of the road has not changed, but the lighting of the headlight The direction may change suddenly.

  Some known lighting devices make some predictions using the internal information of the car. For example, just before the road turns, even if the steering angle of the steering wheel is at an angle corresponding to the curvature of the road, the driver will be able to make the road straight at the end of the road and the road that has passed so far. The vehicle is usually accelerated because it can be seen. Such devices use a combination of information about various situations to return the light beam to its original position that illuminates the center of the road. On the other hand, information acting in the opposite direction to the operation of returning the light beam is not used.

  In this context, the driver normally applies brakes when he notices that the road ahead is turning. However, from the fact that the brake was simply applied, the driver applied the brake to turn right, applied the brake to turn left, or applied the brake because there was an obstacle ahead. I can't know what happened. This type of device can illuminate by predicting the shape of the road only in limited cases.

  Some other known lighting devices utilize data obtained from a navigation system. This navigation system associates the data provided by the mapping system with commands given by the GPS (Global Positioning System).

  With such a navigation system, the road shape can be known in advance. For example, a curve appearing at a predetermined distance ahead of the road can be recognized in advance. Therefore, the direction of the light beam of the automobile can be determined in advance by the information provided by the navigation system, and illumination can be performed prior to the running of the automobile. Such a device is described in detail in European patent applications EP 780,823 and EP 887,229.

  However, navigation systems are currently very inaccurate. Information may be missing or remain old at a predetermined location (road construction may be underway during travel, or a new road may have already been created). The entire country or the entire world may not necessarily be covered by mapping system data. There may also be errors in the data provided by the navigation system. This is seen when one of the navigation system subsystems is faulty, such as when the road is twisted or when GPS signals are disturbed when entering a short tunnel.

  In addition, an error in the data provided by the navigation system is reflected in the navigation to the position B even though the driver has set the navigation system to go to the position A stored in the navigation system. It can also be seen when the system does not follow the indicated direction. Various problems associated with such a navigation system are not only undesirable, but may cause dangerous situations due to lack of reliability.

  The object of the present invention is, in short, to overcome the above-mentioned drawbacks of the prior art. For this reason, the present invention provides information provided from the navigation system and information provided from one or more sensors, in particular from sensors that sense dynamic parameters, such as steering angle sensors or speed sensors of the steering wheel. A vehicle headlight control system that uses both of the above is provided.

  Therefore, the present invention proposes to perform a series of tests on whether the navigation system information and the sensor information are encoded before deciding which control method to employ.

  The first test relates to whether or not the navigation system information matches the sensor information, and is for determining the reliability rate. This reliability rate is a value calculated from the degree of sign of information from the navigation system and information from the mapping system, GPS, and various sensors mounted on the automobile. This value indicates the certainty of the information provided by the navigation system in a standardized way.

  When this reliability rate is a satisfactory value, that is, when a predetermined threshold value is exceeded, instructions from the navigation system are taken into account in the control of the headlight. On the other hand, when the reliability value is insufficient, the headlight is controlled using only information from one or more sensors, particularly sensors that sense dynamic parameters.

  More particularly, the present invention relates to a method for controlling a light beam emitted from a lighting device of an automobile in accordance with the shape of a road, and relates to the movement of the automobile by at least one sensor mounted on the automobile. Detecting at least one piece of information, obtaining navigation system data including a road shape and a reliability rate, and comparing the reliability rate with a predetermined threshold. If it is higher than the threshold, at least part of the data of the navigation system is adopted to determine a command to be issued to the lighting device and then only to one or more information related to the movement of the car A method for determining an effective command for lighting is provided through a process of comparing with a command based on the command.

  The comparison between the above-described reliability rate and a predetermined threshold value is preferably performed after repeating the above-described process a plurality of times. By this comparison, it is verified whether or not there is a large disagreement (diametrically opposite or waveform shape difference or abrupt difference). The final command for lighting is determined by the result of this comparison.

  On the other hand, when the reliability rate is lower than the threshold value, a command related to the rotation angle of the headlight is issued. In this case (when the degree of disagreement is large), a command related to lighting is determined based only on highly reliable data provided from a sensor mounted on an automobile.

  The present invention is also a system for controlling a light beam emitted from a lighting device of an automobile traveling on a road in accordance with the shape of the road, comprising at least one sensor connected to the automobile, A system for providing information related to the movement of a person is provided. The system includes a navigation system mounted on a vehicle, a device for processing information provided by the sensor and the navigation system, and command means for illumination.

  According to the present invention, a method of controlling a light beam emitted from a lighting device of an automobile in accordance with the shape of a road, a system for performing the method, a lighting device using the system, and the lighting An automobile equipped with the device is provided.

  FIG. 1 shows a road 1 on which an automobile 2 having a headlight 3 (also referred to as “lighting device”) travels. The central part of the road 1 has a radius of curvature R. FIG. 1 shows a locus 4 through which the automobile 2 passes by a broken line. The light beam emitted from the headlight 3 preferably travels along the locus 4.

  In order to determine the position of the light beam of the headlight, a distance L called “related distance” must be calculated. The related distance L is a curved distance between the emission point of the light beam (corresponding to the headlight mounting position) and the illumination point E. The illumination point E is an intersection of the desired illumination direction 5 and the center of the road indicated by a broken line. The related distance L can be related to various parameters relating to the shape of the road such as the movement of the automobile such as the traveling speed and the curve.

  According to the navigation system that can provide prediction information related to the shape of the road and the aforementioned intersection, the related distance L can be accurately calculated. For example, when a car is approaching a very angled curve, the so-called hairpin curve, or when it is approaching an uphill with a hairpin curve, ie uphill with alternating right and left curves, headlights The information provided by the navigation system can be used to determine the irradiation direction.

  However, as described in the background section, the information provided from the navigation system may not match the information of the sensor mounted on the automobile or may be incorrect. Therefore, in the method of the present invention, the information provided from the navigation system is compared with the information provided from the sensors mounted on the vehicle such as the steering wheel steering angle sensor, the speed sensor, and the acceleration sensor, so that both are in agreement. Verify whether or not.

  More specifically, in the method of the present invention, it is continuously determined whether or not the road information obtained from the navigation system coincides with the route through which the vehicle actually passes, in particular, the locus where the vehicle has already traveled. Validate. The trajectory that the automobile has already traveled is determined from information provided by a sensor mounted on the automobile.

  The purpose of verifying whether the information matches in this way is that the navigation system instruction is not delayed because it tried to travel on a road that does not exist on the navigation system or because the destination was changed. It is to reduce as much as possible errors in driving operations such as failure to follow the guidance of the system. In the method of the present invention, when such an error is detected, the control is switched to the control based on the sensor mounted on the automobile.

  In other words, the method of the present invention compares the information provided from the navigation system with the information provided from the sensor mounted on the vehicle, and whether or not these two pieces of information match, that is, there is no error between the two. It includes the process of verifying whether or not there is any. If the two pieces of information match, the information from the navigation system is taken into account when controlling the deflection angle of the light beam.

  Conversely, when the two pieces of information do not match, that is, when there is an error between the two pieces of information, priority is given to the information from the sensor mounted on the automobile. Information from the navigation system is not adopted. Only information from sensors mounted on the car is taken into account for controlling the rotation of the headlights.

  The method of the present invention recognizes the superiority of “empirical information obtained by moving the handle” over “information by an inexperienced navigation system”. Therefore, in the method of the present invention, the deflection of the light beam is controlled by combining empirical information and non-empirical information so as not to cause confusion or inconvenience for the driver.

  In other words, in the method of the present invention, in order to eliminate the risk of errors in the lighting system, it is determined whether or not the reliability rate of the navigation system is substantial, that is, whether or not it exceeds a predetermined threshold value. In order to verify, the information of the navigation system is compared with so-called empirical data of sensors mounted on the car. The empirical data is substantially data related to the last position at which the lighting system is operating.

  The information provided by the navigation system (eg reliability, whether the road is straight, under construction, no intersections, etc.) depends on the data provided by the mapping system and the data provided by GPS, and possibly Is a combination of data provided by various sensors inside or outside the navigation system.

  For example, when you are in a place where GPS cannot be used, the reliability rate is very low. On the other hand, much of the information provided from sensors that move with the car is based on actual events and is highly reliable.

  The confidence factor is compared to a threshold value. When the value falls below the threshold, the data by the navigation system is not adopted. Therefore, in the method of the present invention, it is determined whether or not the information provided by the navigation system is to be taken into consideration in consideration of the reliability rate.

  It is also possible to use a combination of information from the navigation system and information from a sensor mounted on the automobile. Such a combination of information can be performed, for example, when the reliability of the navigation system related to the position of the automobile tends to decrease, but does not reach a predetermined threshold.

  The combination of the non-empirical data from the navigation system and the empirical data obtained by moving the handle is "gentle". That is, it is not performed suddenly or suddenly, and is not performed repeatedly over and over.

  When the navigation system is not in the guidance mode, it is impossible to determine which direction to proceed from the intersection when approaching the intersection. However, if the blinker blinks, the route is changed, the steering angle of the steering wheel, etc. are observed, it is possible to know which route is selected as preferred.

  According to the present invention, if it is found that the route predicted using the navigation system is incorrect, it is possible to immediately return to the information from the sensor mounted on the automobile.

  FIG. 2 is a flowchart of the process in the present invention. The object of the method of the present invention is to control the direction of the light beam emitted from the headlight of an automobile by predicting the course of the automobile. The method of the present invention can be implemented after the driver decides to turn on the headlight. The method of the invention can also be carried out continuously when the driver has ignited the ignition, i.e. once the engine is started. The starting process of the method according to the invention is indicated by reference numeral 10 in FIG.

  In the method of the present invention, information from the navigation system is first collected (step 20). In parallel with this, information is also collected from sensors mounted on the vehicle such as a steering wheel steering angle sensor (may be a plurality of sensors depending on the type of sensor) (process 30).

  Next, the reliability of the navigation system is evaluated (process 40). The reliability rate is one of information provided from the navigation system. When the reliability rate is low, that is, below a predetermined threshold, data obtained from the navigation system is not adopted. In this case, the rotation angle of the headlight is determined in step 50.

  In step 50, an algorithm ALG1 that employs only data from the sensor is used. According to this algorithm ALG1, a theoretical value of the rotation angle of the headlight can be obtained. The theoretical value of the rotation angle is obtained by adopting only data from a sensor mounted on an automobile. In step 50, the theoretical value of the rotation angle is compared with each item of so-called empirical data, including information relating to the previous position of the lighting device, so that the rotation of the headlight does not become abrupt.

  When the previous position of the illuminating device is largely deviated from the position that should be theoretically shifted, the position of the illuminating device is gradually moved toward the theoretically obtained position. The speed related to this movement is also determined.

  In order to reach the theoretical position determined by the algorithm ALG1, several operating cycles are required. The operation of moving the lighting device to a theoretically obtained position with the help of algorithm ALG1 or algorithm ALG2 (the function of which will be described below) is hereinafter referred to as “smooth operation”.

  When the reliability rate is substantial, that is, when the predetermined threshold value is exceeded, the theoretical value of the rotation angle of the headlight is calculated in step 60 using the algorithm ALG2 using the navigation system data.

  In this case, in parallel with step 60, in step 70, the algorithm ALG1 uses the algorithm ALG1 as if the data to be adopted is only the data from the sensor mounted on the vehicle, and the theoretical position that the lighting device should take. Is calculated.

  Next, in the method of the present invention, the result obtained in step 70 is compared with the result obtained in step 60 (step 80). This process 80 is for seeing the discrepancy between the results of the two processes using different parameters and different algorithms.

  When the degree of mismatch is small (in other words, when the degree of match is good), the rotation of the headlight is controlled by the result of the calculation performed in step 90. Process 90 is similar to process 50 except that algorithm ALG1 is replaced with algorithm ALG2 in process 50. Process 90 employs not only data from the car sensor but also data from the navigation system as parameters. Further, as in the process 50, a smooth operation of gradually moving the headlight toward the position theoretically obtained using the algorithm ALG2 is also performed.

  If the degree of mismatch between the results of the process 60 and the process 70 is large, the operation described above is repeated in the process 50. This concept of inconsistency applies to empirical data and a set of displayed non-empirical data. For example, if the navigation system shows that the road between the driving car and point E is straight, but the steering angle of the steering wheel is significantly different from zero, the driver will enter the mapping system. There is a high probability of driving on a road that has not been entered. However, the rotation angles of the headlights obtained from the algorithm ALG1 and the algorithm ALG2 may be greatly different if not mutually inconsistent.

  The final process 100 is a process of transmitting the lighting command formulated in the process 90 or 50 to the lighting device. Then, the previous cycle is repeated from step 10.

  As already described, data obtained from a single sensor mounted on an automobile, such as a steering wheel steering angle sensor, can be used, and data obtained from a plurality of sensors can also be used.

  FIG. 3 shows a headlight of an automobile provided with a control system according to the present invention. In this figure, a headlight 200 including an optical glass or cover glass 201 and a light source 203 attached to a movable support base 202 is shown. A support base 202 associated with a rotating device 204 such as a ball joint is driven by a motor 205.

  The control system according to the present invention also includes a data processing device 206 that receives data from the sensor 207 mounted on the automobile and the navigation system 208. The data processing device 206 performs steps 20 to 100 of the method according to the present invention and sends commands to the motor 205. The data processing device 206 is a lighting control device, a navigation system itself, and a device that performs calculations and electronic processing by a computer on an automobile.

  The sensor 207 is a sensor that is installed in the automobile as an inside or outside of the navigation system, and is a standard device for the automobile such as a speed sensor, an acceleration sensor, a steering wheel angle sensor, a road curve sensor, or a centrifugal force sensor.

  The sensor 207 can also be composed of a plurality of sensors. The sensor 207 may be a peripheral sensor specially provided for illumination control, such as a camera, a fog detector, or a white line sensor. The plurality of sensors may include an automatic flashing device that provides information related to the driver's behavior in real time.

  Sensors mounted on automobiles generally provide highly reliable information. This is because this information is measured in real time. On the other hand, information from a peripheral sensor such as a white line sensor is not adopted alone. This is because the marks on the surface of the earth may be misread because all or part of them disappears or fades due to rain. However, this information may be associated with information provided by other sensors in the car and contribute to predicting the car's trajectory. In addition, the information provided from the peripheral sensor may be combined with information provided from a sensor other than the sensor related to the automobile track prediction.

  In a modification of the present invention, the information provided from the white line sensor is replaced with this information when the reliability rate of the information provided from the navigation system is low.

  The camera can be fixed to the car and used as a peripheral sensor. A camera with a large number of pixels can provide a large amount of data. However, this data should be tested to verify whether it is necessary. In that case, an index of reliability of information provided from the camera can be calculated, and it can be determined from the index whether this information is adopted.

  The navigation system 208 typically includes a GPS and a mapping system associated with each other so that the driver can indicate the course to be taken. Thus, the navigation system provides information about the location of the car, possible routes, and intersections via a dedicated link such as a serial connection or multiple transmission network such as a CAN network.

  A navigation system associated with a sensor mounted on a vehicle prepares an environment in which a computer or data processing device for lighting control can improve the lighting function of the vehicle by using information available from the navigation system. Actually, if the computer for lighting control is connected to the navigation system so as to receive the above-mentioned information, the above-mentioned object can be achieved.

  The method of the present invention described so far has many uses that can confirm the reliability of the method. First, as described above, the present invention can be applied to use for adjusting the direction of the headlight of an automobile.

  Next, the method of the present invention is also applied to the use of adjusting the manner in which the automobile illuminates the road when the automobile moves from the country where the automobile is left-side traffic to the country where the automobile is right-side traffic. it can. For example, when a car enters France from the UK, the direction and shape of the light beam can be automatically changed to illuminate mainly the right side of the car, like a car traveling in France. it can.

  Since the navigation system can detect whether the vehicle is in France or the United Kingdom, according to the present invention, the direction of illumination can be automatically controlled.

  Furthermore, the method of the present invention can also be applied when entering and exiting a tunnel, an indoor parking lot, or a place not exposed to the sun. In this case, if the navigation system provides the relevant information, the vehicle headlights are turned on before the vehicle enters a place where it is not exposed to the sun. In this case, what is controlled is not the direction of the light beam but the turning on and off of the headlight.

  In addition, the present invention can be applied to street lighting. In this application, if the navigation system provides relevant information, that is, if the reliability of the information is high, both the driver and the pedestrian will catch each other when the car approaches the intersection. Also on the road, the light beam spreads flat so that the visible range is widened. In this application, the headlight is controlled not only in the direction of the light beam but also in its size.

  The present invention can also be applied to traveling on a highway. In this application, if the navigation system predicts that the car will enter the highway, it switches the car's lighting system for highway driving. In this case, according to the present invention, one or more elements of the headlight belonging to the advanced front lighting system can be moved as required.

It is a top view which shows typically the locus | trajectory of the motor vehicle in driving | running | working in which it is requested | required to direct a light beam to the optimal direction. It is a flowchart explaining operation of each process in the method of the present invention. It is a block diagram which shows typically the headlight of the motor vehicle provided with the light beam control system which concerns on this invention.

Explanation of symbols

1 Road 2 Car 3 Headlight 4 Trajectory 5 Desired lighting direction
200 headlights
201 Cover glass
202 Movable support base
203 Light source
204 Rotating device
205 motor
206 Data processor
207 sensor
208 Navigation system

Claims (15)

  1. A method of controlling a light beam emitted from a lighting device of a running car in accordance with the shape of a road,
    At least one piece of information related to the dynamic behavior of the vehicle is acquired by at least one sensor mounted on the vehicle (30), and the first lighting command (ALG1) is determined based only on the acquired information related to the dynamic behavior. ,
    Obtain a series of navigation data including the road shape and reliability (20), compare the reliability with a predetermined threshold (40),
    When the reliability rate is higher than the threshold value , the second illumination command (ALG2) is determined in consideration of at least a part of the navigation data,
    When the reliability rate is lower than the threshold value, the first illumination command is given to the illumination device.
    The method further includes: when the reliability rate is higher than the threshold value.
    Comparing the first illumination command with the second illumination command (80);
    When the difference between the first illumination command and the second illumination command is smaller than a predetermined threshold value, the second illumination command is given to the illumination device (90, 100),
    If the difference between the first illumination command and the second illumination command is greater than a predetermined threshold value, the first illumination command is given to the illumination device (50, 100).
    Method.
  2. The control method according to claim 1, further comprising acquiring a plurality of information related to the behavior of the automobile.
  3. 3. The control method according to claim 1 , wherein smooth operation of the control data is further performed (50) (90) .
  4.   The control method according to claim 1, wherein the illumination device is controlled to determine a direction of a light beam.
  5.   The control method according to any one of claims 1 to 4, wherein the control of the illumination device is performed in order to select a size and a shape of a light beam.
  6. The control method according to claim 1, wherein the lighting device is controlled to turn on / off the light beam.
  7. A system for controlling a light beam emitted from a lighting device (200) of an automobile (2) traveling on a road (1) according to the shape of the road, the system being connected to the automobile Comprising at least one sensor (207) for providing information on the behavior of the vehicle;
    A navigation system (208) mounted on the vehicle;
    An apparatus (206) for processing information provided by the sensor and the navigation system comprising means for performing the method according to any of claims 1-6;
    A system comprising: means (205) for controlling illumination ;
  8. The navigation system, the control system according to claim 7, characterized in that it comprises at least one mapping system, and a GPS.
  9.   9. The control system according to claim 7, wherein the sensor is a sensor that is provided as a standard in an automobile.
  10. The control system according to claim 7, wherein the sensor is a peripheral sensor specially installed for lighting control.
  11.   The control system according to any one of claims 7 to 10, further comprising a plurality of sensors including a sensor provided as a standard in the automobile and a peripheral sensor specially installed for the lighting control. .
  12. The control system according to claim 9, wherein the sensor provided as a standard in the automobile is a steering wheel angle sensor, a vehicle speed sensor, an orientation sensor , or a centrifugal force sensor.
  13. The control system according to claim 10, wherein the ambient sensor specially installed for the illumination control is a camera, a white line detector, or a fog detector.
  14.   An automobile lighting device using the control system according to claim 7.
  15.   An automobile comprising at least one lighting device according to claim 14.
JP2003367421A 2002-10-30 2003-10-28 Method for controlling a light beam emitted from a lighting device of an automobile and a system for implementing this method Active JP4458809B2 (en)

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FR0213898A FR2846609B1 (en) 2002-10-30 2002-10-30 Method for controlling the light beams emitted by a lighting device of a vehicle and system for implementing said method

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AT (1) AT317780T (en)
DE (1) DE60303580T2 (en)
ES (1) ES2256696T3 (en)
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FR2846609B1 (en) 2005-08-19
DE60303580D1 (en) 2006-04-20
US20040085201A1 (en) 2004-05-06
ES2256696T3 (en) 2006-07-16
EP1415856A1 (en) 2004-05-06
AT317780T (en) 2006-03-15
US7280901B2 (en) 2007-10-09
DE60303580T2 (en) 2006-12-14
FR2846609A1 (en) 2004-05-07
JP2004149116A (en) 2004-05-27

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